Renauld parts a Ripp off.

I am so shocked at the price of my service with Renauld Woodmeat. I paid R 4145.48 FOR 4 SPARK PLUGS. I could get the same spark plugs for R 1191.83 exactly the same code on as the Renauld ones. I don't mind paying for things but don't rip me off please. I will never again take my vehicle to a Renauld dealer for a service. I have driven a Renald for the last 20 years. That will also change in the near future. Very disappointing..